/Engine/Plugins/AudioGameplayVolume/Source/AudioGameplayVolume/Public/AudioGameplayVolumeMutator.h
Create this component's type of mutator
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FProxyVolumeMutator](API\Plugins\AudioGameplayVolume\FProxyVolumeMutator) > FactoryMutator() const